Printer, method of printing, and non-transitory recording medium

A method of printing performed by a printer being moved on a print medium, comprising:

• emitting light to the print medium or an object to be irradiated;
• receiving light reflected from the print medium or the object to generate image data;
• calculating a moving amount of the printer after a movement thereof, based on a difference in the image data generated before and after the movement;
• calculating a deviation angle of an installation angle of the optical moving amount calculator installed in the printer, based on a calibration moving amount of the printer or the object after a calibration movement thereof that is a parallel translation;
• and
• correcting the moving amount of the printer after the movement thereof, based on the calculated deviation angle of the optical moving amount calculator.

A non-transitory recording medium storing a plurality of instructions which, when executed by one or more processors, cause the processors to perform a method, comprising:

• emitting light to the print medium or an object to be irradiated;
• receiving light reflected from the print medium or the object to generate image data;
• calculating a moving amount of the printer after a movement thereof, based on a difference in the image data generated before and after the movement;
• calculating a deviation angle of an installation angle of the optical moving amount calculator installed in the printer, based on a calibration moving amount of the printer or the object after a calibration movement thereof that is a parallel translation;
• and
• correcting the moving amount of the printer after the movement thereof, based on the calculated deviation angle of the optical moving amount calculator.